The In-Browser File Encrypter is a simple web application that enables you to securely encrypt your files directly in your browser using the AES-256 encryption algorithm in CBC mode.
Check it out at: https://northstrix.github.io/In-Browser-File-Encrypter/V1.0/web-app.html
GitHub page: https://github.com/Northstrix/In-Browser-File-Encrypter
The download shortcut: https://sourceforge.net/projects/in-browser-file-encrypter/files/V1.0/web-app.html/download
Successfully tested in Google Chrome...